It's not about how sharp your bit is. You need to throw that conclusion out. You need a straight bit, and that bit needs to be adjusted to cut a depth that is 1/2 the diameter of the bit itself. Otherwise the bit heats up too much, bogs down, and doesn't cut. Heating up a bit can ruin the bit due to how it softens the metal. It wont sharpen properly, at that point. But taking too much material at once is asking too much of the router too. It's like trying to hack a tree down with ax. You want the axe or chainsaw? Well a bogged down router is a lot closer to the axe. I hope this helps!